.header-wrapper {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    z-index: 2;
}
.nav-wrapper {
  position: fixed;
  left: 0;
  right: 0;
  top: 44px;
}
.mask{
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, .5);
}

.form {
    padding: 5px 15px 0;
    background: #fff;
}
